# red5

**URL:** <https://forum.kirupa.com/t/red5/253117>\
**Category:** Uncategorized\
**Created:** [February 27, 2008, 9:21am UTC](https://forum.kirupa.com/t/red5/253117 "2008-02-27T09:21:19Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![amritakrishna](https://avatars.discourse-cdn.com/v4/letter/a/839c29/32.png) [@amritakrishna](https://forum.kirupa.com/u/amritakrishna)\
**Post date:** [February 27, 2008, 9:21am UTC](https://forum.kirupa.com/t/red5/253117/1 "2008-02-27T09:21:19Z")

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I am trying to install red5 on CENTOS 4.5 linux server.  
I’ve installed JDK 1.6.0 and apache ant 1.7.0  
but when i run the red5.sh it shows a classDefnotfound exception in standalone class.

can anyone help me.  
its very urgent…  
thanking you